| 381 | Foreign key columns that are associated with a sequence generator | Find foreign key columns that are associated with a sequence generator. Foreign key values are selected amongst the values that are registered as corresponding primary key/unique key values. Values in the foreign key columns are not directly generated by the system. These values might be system generated indirectly - generated when a row is added to the primary (parent) table. | Problem detection | INFORMATION_SCHEMA+system catalog base tables | 2021-03-08 00:42 | MIT License | |
| 382 | Foreign key columns that do not have an integer or varchar type | Find foreign key columns that do not have smallint, integer, bigint, or varchar(n) type. These are the most commonly used types in case of key/foreign key columns. Although the use of other types would be perfectly legal as well, make sure that you have selected the best possible data type for each and every column. | General | INFORMATION_SCHEMA+system catalog base tables | 2020-11-16 10:14 | MIT License | |
| 383 | Foreign key columns that have no index | Find foreign key columns that do not have an index. Foreign key columns are often used for performing join operations. It is useful to index such columns. | Problem detection | INFORMATION_SCHEMA+system catalog base tables | 2021-02-25 17:30 | MIT License | |
| 384 | Foreign key references a non-key (has optional columns) | Find foreign key constraints that referenced column is optional. | Problem detection | INFORMATION_SCHEMA+system catalog base tables | 2021-03-10 12:12 | MIT License | |
| 385 | Foreign servers without user mappings | Find foreign servers that do not have any associated user mappings. "A user mapping typically encapsulates connection information that a foreign-data wrapper uses together with the information encapsulated by a foreign server to access an external data resource." | Problem detection | INFORMATION_SCHEMA+system catalog base tables | 2021-02-25 17:29 | MIT License | |
| 386 | FOR UPDATE in derived tables | Find derived tables that subquery uses FOR UPDATE construct. Reading a data element shouldn't block other read operations of the same element. Thus, you shouldn't use exclusive locking command in a view. | Problem detection | INFORMATION_SCHEMA+system catalog base tables | 2022-12-12 11:11 | MIT License | |
| 387 | FOR UPDATE is not allowed with aggregate functions | Implement explicit locking correctly. Instead of writing, for instance, SELECT Count(*) AS cnt FROM person WHERE person_id=1 FOR UPDATE; one has to write SELECT person_id FROM person WHERE person_id=1 FOR UPDATE; | Problem detection | INFORMATION_SCHEMA+system catalog base tables | 2021-11-04 11:23 | MIT License | |
| 388 | FOR UPDATE is not needed if there is no FROM clause in the SELECT statement | Find routines that use SELECT … FOR UPDATE without selecting rows from a specific table. For instance: SELECT 'text' AS v FOR UPDATE; | Problem detection | INFORMATION_SCHEMA+system catalog base tables | 2021-11-05 14:10 | MIT License | |
| 389 | Frequency of column name lengths based on the table type | Find in case of base tables, materialized views, and views the number of columns based on the length of the column name. | Sofware measure | INFORMATION_SCHEMA+system catalog base tables | 2022-11-22 14:43 | MIT License | |
| 390 | Frequency of lengths of the names of database objects | "Names in software are 90 percent of what make software readable. You need to take the time to choose them wisely and keep them relevant. Names are too important to treat carelessly. Names should not cause confusion." (Robert C. Martin, Clean Code) Names should be expressive. Find how many names (identifiers) of database objects there are with different lengths. The values could be used to compare different databases. | Sofware measure | INFORMATION_SCHEMA+system catalog base tables | 2024-12-21 16:39 | MIT License | |
| 391 | Frequency of name components of database objects | "Names in software are 90 percent of what make software readable. You need to take the time to choose them wisely and keep them relevant. Names are too important to treat carelessly. Names should not cause confusion." (Robert C. Martin, Clean Code) Names should be expressive. Find, what are the most popular components of the names (identifiers) of user-defined database objects, assuming, that the separator of the components is "_". | Sofware measure | INFORMATION_SCHEMA+system catalog base tables | 2024-12-21 16:50 | MIT License | |
| 392 | Frequency of table name lengths based on the table type | Find in case of base tables, materialized views, and views the number of tables based on the length of the table name. | Sofware measure | INFORMATION_SCHEMA+system catalog base tables | 2022-11-23 01:09 | MIT License | |
| 393 | Frequent names of database objects | "Names in software are 90 percent of what make software readable. You need to take the time to choose them wisely and keep them relevant. Names are too important to treat carelessly. Names should not cause confusion." (Robert C. Martin, Clean Code) Names should be expressive. Find the names (identifiers) of user-defined database objects that occur at least twice as frequently as a name occurs in average. Also make sure that there is no duplication in play. | Sofware measure | INFORMATION_SCHEMA+system catalog base tables | 2024-12-21 16:49 | MIT License | |
| 394 | Frequent names of database objects by object type | "Names in software are 90 percent of what make software readable. You need to take the time to choose them wisely and keep them relevant. Names are too important to treat carelessly. Names should not cause confusion." (Robert C. Martin, Clean Code) Names should be expressive. Find the names (identifiers) of user-defined database objects that occur at least twice as frequently as a name occurs in average in case of the particular type of database objects. Also make sure that there is no duplication in play. | Sofware measure | INFORMATION_SCHEMA+system catalog base tables | 2024-12-21 17:24 | MIT License | |
| 395 | Full text search columns that have no gin or gist index | Find columns of base tabels and materialized views with the type tsvector that do not have a gin or a gist index. These are the preferred index types for text search. | Problem detection | INFORMATION_SCHEMA+system catalog base tables | 2023-11-07 09:22 | MIT License | |
| 396 | Full text search columns with other type of index than gin or gist index | Find columns of base tabels and materialized views with the type tsvector that do not have a gin or a gist index but have another type of index (e.g., b-tree). Gin and Gist are the preferred index types for text search. | Problem detection | INFORMATION_SCHEMA+system catalog base tables | 2023-11-07 09:22 | MIT License | |
| 397 | Function in a function-based index of a column is different from the function that is used in the subquery of a derived table | Find cases where the function of a function-based index of a column is different from the function that is used in the query in a derived table based on the column. | Problem detection | INFORMATION_SCHEMA+system catalog base tables | 2021-02-25 17:29 | MIT License | |
| 398 | Function in a function-based index of a column is different of the function that is used in the query in a routine based on the column | Create appropriate indexes to speed up queries. If you apply a function to a column in a query, then create a function-based index based on the function to the column. | Problem detection | INFORMATION_SCHEMA+system catalog base tables | 2021-11-04 17:26 | MIT License | |
| 399 | Functions that have transactional control | Find functions that contain transactional control statements (BEGIN, START TRANSACTION, COMMIT, ROLLBACK, SAVEPOINT) in their body. PostgreSQL does not permit transaction control in functions. | Problem detection | INFORMATION_SCHEMA+system catalog base tables | 2021-11-04 10:50 | MIT License | |
| 400 | Grantable column privileges | Find column privileges that the carrier of the privilege can in turn grant to others, i.e., the privileges have been given WITH GRANT OPTION. The number of privileges that can be passed on should be as small as possible. | Problem detection | INFORMATION_SCHEMA+system catalog base tables | 2024-01-07 13:43 | MIT License | |